I didn't expect to post another diary this soon, but Doonesbury went there this morning. http://doonesbury.slate.com/... (Those who missed Trudeau's biting cartoon sequence on "Silent Scream" in 1985 can view the published version here http://doonesbury.slate.com/....)
The obvious fallacy, of course, is that eggs aren't persons. Eggs aren't even chickens. You won't find them in the same chapter of your cookbook, and there's that age-old conundrum, "which came first, the chicken or the egg?" Bear in mind that only a fertilized egg has the potential to precede a chicken.
The less obvious fallacy is the unconstitutional idea that if an egg possessed the full rights of personhood, it couldn't be forcibly evicted. Persons get evicted all the time in the United States of America. Hell, persons get SHOT in the red states, if they wander into a house unannounced. What do you think would happen there to a person who barged into someone's kitchen and threatened to mooch from their refrigerator for the next nine months and then force a grapefruit through their private parts, possibly leaving them incontinent for the rest of their life?
Seriously, this is a country where a thirty-year-old can't be forced to donate bone marrow to save the life of a five-year-old child. Carrying a pregnancy to term is way, way riskier for the mother than donating bone marrow. Assuming access to modern medical care, it's more in line with donating a kidney, which we can't force anyone to do. So if that egg is declared a person (which I believe we should do everything in our power to prevent), I think we have the constitutional right to bodily integrity solidly on our side.